Adjustable toolholder for lathes



Jan. 8, 1952 l.. J. sUBER 2,581,980

ADJUSTABLE TOOLHOLDER FOR LATHES 2 SHEETS- SHEET l Filed Jan. 3l, 1947 K INVENTOR.v .LOLLLS J.' ,Saber M wif f-f u1., J. SUBER JADJUSTABLE TooLHoLDER FOR LATHES Jan. 8., 1952 2 SHEETS-SHEET 2 Filed Jan. 31, 1947 k m\ W.

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INVENTOR. Louis Jfabez wiwi/Jui;

errrs Patented Jan. 8, 1952 UNITED STAT E1s PAT ENT "oF-Fics il This invention is directed to, and it isA an object to provide, a novel, adjustable tool holder for lathes; saidtool holder being manually operative to cause the supported tool tofautomatically cut or shape thework convexly or concavely, and on a predetermined radii."

Another object of the invention is to provide a to'ol holder, as above, in which thetool actuating mechanism is adjustable so that the radius of the cut may be altered by the operator, selectively.

A further object of the invention is to provide a tool holder for lathes which comprises, in novel assembly, a tool holding bar adapted to extend transversely of the work, vapair of horil,2 claims. (Cl. 82-12) longitudinally in a direction transversely of the u and traversing gears, respectively. v The gears 6 and 1 are disposed in annular seats 8 formed in the bottom of the case I, and said gears run in mesh at one side with an actuating screw 9 mounted in the case I in a side bore therein.

, The screw 9 is axially immovable, but is adapted zontal gears disposed directly below the tool y,

bar and connected forr simultaneous rotation, and each gear including an upstanding pin, the pins being mounted on the gears for adjust-- ment radially thereof to eccentric positions,:one pin being turnably secured to the tool bar and to be rotatedtby a crank handle I0 at the rear end of the device.. The gears 6 and 1, togetherwith the screw 9, are of worm type. Each of the gears 6 and 1 is formed with a radially extending, upwardly-opening slot I I,.in which an adjustment screw I2 is' disposed diametrally of the corresponding gear. Adjacent one end thereof each adjustment screw I2 is formed with a cylindricalhead I3 rotatably but axially immovably seated in a bore I4 inthe corresponding the other pin being turnably and longitudinally I slidably secured to said bar, whereby upon simultaneous rotation of the gears the relative eccentricity of the pins causes the tool to traverse an accurate path.

A further object of the invention is to provide a simple and inexpensive adjustable tool holder for lathes, and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the followingv speciiication and claims.

In the drawings:

Fig. 1 is a top plan view of the adjustable tool holder, with the cover plate removed.

Fig. 2 is an enlarged cross section on line 2-2 of Fig. 1.

Fig. 3 is a front end view of the tool holder.

Fig. 4 is an enlarged view, similar to Fig l, but with the tool bar removed, and partially broken away to show the driving means for the gears. In this view the normally detached adjusting knob is shown in its position of use.

Referring now more particularly to the characters of reference on the drawings, the adjustable tool holder for lathes comprises a rigid case, indicated generally at I, which case is troughlike and includes a removable cover plate 2. The case I is elongated and is adapted to be mounted on a lathe slide by means of an inverted T-base 3, secured to the case I at the bottom and lengthwise thereof by bolts 4, tightening of which is accomplished by Allen nuts 5. As so mounted on a lathe slide, the case I extends gear beyondone end of the slot II.

Each head I3 includes an outwardly opening, non-circular socket I5 adapted to registerwith an access bore I6 in one side of the case I when v the corresponding gear is in a certain rotative position. Y

' Each adjustment screw I2 is adapted to be rotated by a normally detached, adjusting knob I1, including a non-circular shank I8 adapted to project through each of the access bores I6 into the corresponding socket I5 when alined therewith. The knob I'I includes a calibrated disc I9 adapted to read on a pointer 20 or the like on the side of the case I adjacent each access bore I6. The adjusting knob I1 is of course wholly removed from the device when the latter is in use.

Each of the adjustment screws I2 is threaded through a slide block 2| slidably disposed in the corresponding radial slot II, and each slide block 2I carries an upstanding pin, said pins being indicated at 22 and 23, corresponding to the gears 6 and 1, respectively. The pins 22 and 23 terminate at their upper ends closely adjacent the bottom of the cover plate 2.

At its forward end the case I is initially open downwardly some distance from the cover plate 2, and a rigid elongated tool bar 24- extends into said case from said front end, and within the case lies above the gears 6 and 1 in intersecting relation thereto. The pin 2'2 is directly journaled in the tool bar 24, while the pin 23 is journaled in a slide block 25 slidable lengthwise of said tool bar in a longitudinal slot 26 therein.

At the front end of the case the tool bar 22 the pies' Having thus described the invention, the following is claimed as new and useful, and upon which Letters Patent are desired:

1. A lathe-tool holder comprising a mounting case, a pair of rotary members mounted in spaced relation in the case, means to rotate the meiny bers in unison, a tool bai' extending across the eccentricity, which adjustment is accomplished,Y

by rotation of the adjustment screws I2 throughY The positionv of; rel,`

the medium of the knob l1. ative eccentricity of the pins 22 and 23, which predetermines the arcuate configuration and radii of the cut on the work, is-,setby the operator;

by a reading of the calibrated disc I9 on the A pointers 20.

After the pins 2'2 and 243 are set to a predeterminedpcsitiomoz relative eccentrici-ty,;.the crank.V handle l0 is rotated., in one: direction or theV othentozcause simultaneouspzotation ofi the; gears I thefeedzgear either advances orrretcasrthe toolf bait 214.', depending trporrs'the typeV ofi' cut; AirA the samer time thetraversing gear, impartsirelative'lateral motion, inior'zefrdn'ectiernor ther other; to the rear end; of'said ;tooiibar:v Thefcombination or the mo'- tiensitiiusiniparted;to-tlie :tool bar by the-pins- Hsandzimpon shr-rultaneeusnzotation of thefgears 'tif causes tl1e tool. Zitto traverse4v an: arcuatespatlr; which may/t'befeithersconvex; or con-V cave; depen;ding-z onitheesetting; of thepins and the'rdirectioni.iofirataztioncoigthe fsc-rew 'f :2n Y

Enf this.- manner arcuate: cuts, either concave;

orconvex; andwofxpre-seleeted radii, can be effectiyetyraccurately andrantomaticallyf-made by 'the operatorfby manipulation requiringgonly rotationv mamaria-foregoing description itwiii be wadface of.. both members a pinprojecting from onemember parallel to: the axis thereof and turnably projecting into the bar, means to adjust the pin radially of the member, another pin projecting from the other member parallel to theaxis.thereof,v means to adjust said other pin radially of said other member, and a block` in which said other pin is turnable, the tool `oar having-ja longitudinal slot in which said :block slides` 2; A device, as in claim 1, in which the means to adjust either pin comprises, with a radial slot infthe correspondinglmeinber, screw turnably mountedin thememberand extending along the slot, a 'block' oni the pin guidedV in saidv slot andV through'which thascrewis threaded, and an element 1on1 the outer end. of the screw. `within .but exposed toronefsideofj thefmember for engagementfwith a screW-turningltool; the'` member being:countersunlrin theacase and the latter` having an opening iny one side. to register with said-element'when thefmember; is. disposed in a predetermined position in the case.

LOUIS J. SUBER;

-REFERENGES CITED: f

The following references arefofrecord in the filey of' this" patent:- u Ul.\lITllI), 4 STATES PATENTS 6 Q8.;53: y FranceIA i-.. July 28, 1926 

